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A microarray screen for direct targets of Zic1 identifies an aquaporin gene, aqp‐3b , expressed in the neural folds
Author(s) -
Cornish E. Jean,
Hassan Sabah M.,
Martin Joshua D.,
Li Shuzhao,
Merzdorf Christa S.
Publication year - 2009
Publication title -
developmental dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.634
H-Index - 141
eISSN - 1097-0177
pISSN - 1058-8388
DOI - 10.1002/dvdy.21953
Subject(s) - biology , neural tube , neurulation , neural plate , neural fold , microbiology and biotechnology , transcription factor , pou domain , neurula , neural crest , hindbrain , neural development , gene , xenopus , retinoic acid , microarray analysis techniques , genetics , homeobox , embryogenesis , gene expression , gastrulation , embryo
The Zic1 transcription factor plays multiple roles during early development, for example, in patterning the early neural plate and formation of the neural crest, somites, and cerebellum. To identify direct downstream target genes of Zic1, a microarray screen was conducted in Xenopus laevis that identified 85 genes upregulated twofold or more. These include transcription factors, receptors, enzymes, proteins involved in retinoic acid signaling, and an aquaglyceroporin ( aqp ‐ 3b ), but surprisingly no genes known to be involved in cell proliferation. We show that both aqp ‐ 3 and aqp ‐ 3b were expressed in adult tissues, while during early embryonic development, only aqp ‐ 3b was transcribed. During neurula stages, aqp ‐ 3b was expressed specifically in the neural folds. This pattern of aqp ‐ 3b expression closely resembled that of NF‐protocadherin ( NFPC ), which is involved in cell adhesion and neural tube closure. Aqp‐3b may also be involved in neural tube closure, since mammalian Aqp‐3 promotes cell migration and proliferation. Developmental Dynamics 238:1179–1194, 2009. © 2009 Wiley‐Liss, Inc.